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介绍的新型地基大气廓线微波探测仪样机,对进口并普遍使用的MP3000地基大气探测仪进行了结构创新,采用温度廓线测量的V波段(50~59 GHz)和湿度廓线测量的K波段(22~31GHz),每个频段采用7个通道。与MP3000不同,采用独立反射面,而非共享反射面的形式。接收机采用直接检波方式,而不采用超外差检波方式,避免了接收机下变频部分,结构上更简单,空间分辨率更高,维修更容易。这种新型设备具有体积小、质量轻、空间分辨率高和非线性误差低的特点。利用辐射传输方程和已知探空资料相关数据,计算各通道加权函数,计算各通道亮温,采用神经网络算法进行大气温度廓线的反演,结果证明,此样机在结构改进的基础上完全满足地基大气廓线仪结构简单,对时间分辨率和空间分辨率,温度廓线反演结果达到预期要求。
The prototype of the new ground-based atmospheric profiled microwave detector introduced in this paper is a structural innovation of the imported and commonly used MP3000 ground-based atmosphere detector. The K band, measured in the V band (50-59 GHz) and the humidity profile of the temperature profile, (22 ~ 31GHz), each channel uses 7 channels. Unlike the MP3000, it uses an independent reflective surface rather than a shared reflective surface. The receiver uses the direct detection method instead of the superheterodyne detection method to avoid the down-conversion part of the receiver. The structure is simpler, the spatial resolution is higher, and the maintenance is easier. This new device features small size, light weight, high spatial resolution and low nonlinearity error. Based on the radiation transmission equation and the related sounding data, the weight function of each channel is calculated and the bright temperature of each channel is calculated. The neural network algorithm is used to invert the atmospheric temperature profile. The results show that this model is complete based on the structural improvement Satisfying the structure of the ground profiler is simple, the time resolution and spatial resolution, temperature profile inversion results meet the expected requirements.